1. Textbook of Embryology;Jordan,1942
2. Histology;Ham,1950
3. Fibrous Osteoma of the Jaws;Phemister;Ann. Surg.,1937
4. Osteoma of the Frontal Sinus;Novich;Arch. Otolaryng.,1947
5. Pathology of Malignant Tumors Arising in the Nasal and Paranasal Cavities;Ringertz;Acta Oto-laryng., supp.,1938